There were quite a few dog/puppy shots in this challenge, so I guess many agree with you about little boys liking puppies - both are young, rambunctious and get into all kinds of mischief together. I gave you a 6 in voting. This pup does look like he's ready to romp at the toss of a ball or stick. Liking the amount of detail, though I missed the wagging tail originally, it does add to the atmosphere of expectancy and waiting to play.
Technically looks like doggie is backlit and his face is somewhat in shadow - wouldn't hurt to use the dodge tool to bring out the face and eyes, and burn around the ears. Though I don't advocate using massive amounts of pp, I'm not afraid to see it used carefully, especially in an Expert level challenge. The crop is a teeny bit tight esp at the top, but overall a nice shot and very worthy entry for this challenge. Keep on shooting and entering!